gaza city is a very densely packed city. across the border in israel, the barrage of rocket fire continues. cnn's fred plankin runs for cover when sirens warn of a possible rocket attack. >> we are going to get to a safer place. an air alarm going off right now. we're going to get into a safer place. come on. it literally just went off. let's get this unplugged. >> please be safe. >> when the rockets land, destruction, lives changed forever. at least 11 hit the southern city of birsheva. a home left in ruins, a family of six survived with just 30 seconds to spear. tel aviv, a residential building is also hit. u.s. secretary of state hillary clinton arrived for peace talks. >> the goal must be a durable outcome that promotes regional stability and advances the security and legitimate aspirations of israelis and palestinians alike. >> and that is what the last 24 hours have looked like, again, breaking news this evening, a series of massive explosions have really rocked central gaza city over the last hour or two. and we -- it